Question
Asked Jan 22, 2020
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Which releases the greatest amount of energy?

a. Anaerobic respiration

b. Fermentation 

c. Glycolysis 

d. Photosynthesis 

e. Aerobic respiration 

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Expert Answer

Step 1

Adenosine triphosphate (ATP) can store, release, and transport chemical energy within cells. The hydrolysis of ATP to adenosine diphosphate (ADP) and phosphoric acid (Pi) releases energy. Chemical reactions that take place in the cell require energy. Hydrolysis reactions of ATP can meet this energy requirement.

Step 2

Anaerobic respiration:

It is a process in which energy is created without the presence of oxygen. During this process, sulfate functions as a final electron acceptor for an electron transport chain. Anaerobic respiration yields a total of 2 ATP. 

Fermentation

Fermentation is one of the anaerobic processes for breaking down glucose. The total energy released during fermentation is 2 ATP molecules per glucose. In both lactic acid and alcoholic fermentation, all the NADH formed in glycolysis is used in fermentation, so there will be no net NADH production to enter the ETC and form more ATP.

Step 3

Glycolysis:

It is the process in which glucose is converted into two molecules of pyruvate, two molecules of ATP, two molecules of NADH. Glycolysis can begin with or without oxygen.

Photosynthesis:

During photosynthesis plants, some bacteria and some protistans use the energy from inorganic materials CO2 and H2O with the help of absorbed solar energy to yield glucose. This glucose is then converted into pyruvate which releases adenos...

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